输出各种图案(星号表示)

右上直角

***
 **
  *

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
int i, j, n; 

scanf("%d", &n);//输入3 

for (i = n; i > 0; i--){
	for (j=0;j<n-i;j++){
	    printf (" ");
  }     
	for (j=i;j>0;j--){
		printf ("*");
  }     
  	printf("\n");
}

	return 0;
}

左上直角

***
**
*

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
int i, j, n; 

scanf("%d", &n);//输入3 

for ( i = n; i > 0; i--){ 
  for (j = i; j > 0; j--){
		printf("*");
	}      
	printf("\n");
}

	return 0;
}

右下直角

  *
 **
***

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
int i, j, n; 

scanf("%d", &n);//输入3 

for (i = 1; i <= n; i++){
  for( j = n; j > i; j--){
    printf (" ");
  }     
  for( j = 0; j < i; j++){
    printf ("*");
  }     
printf("\n");
}

	return 0;
}

左下直角

*
**
***

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
int i, j, n; 

scanf("%d", &n);//输入3 

for (i = 1; i <= n; i++){
//  for( j = n; j > i; j--){
//    printf (" ");
//  }     
  for( j = 0; j < i; j++){
    printf ("*");
  }     
printf("\n");
}

	return 0;
}

倒三角

*****
 ***
  *

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
int i, j, n; 

scanf("%d", &n);//输入3 

  for (i = n; i > 0; i--){
    for ( j = 0; j < n - i; j++){
      printf (" ");
    }     
    for ( j = 2 * i; j > 1; j--){
      printf ("*");
    } 
printf("\n");
}

	return 0;
}

正常三角

  *
 ***
*****

#include <stdio.h>
#include <stdlib.h>

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
int i, j, n; 

scanf("%d", &n);//输入3 

for (i = 1; i <= n; i++){
  for (j=n-i;j>0;j--){
    printf (" ");
  }     
  for ( j = 1; j < 2 * i; j++) {
    printf ("*");
  }     
  printf("\n");
}

	return 0;
}

沙漏

*****
 ***
  *
 ***
*****

#include <stdio.h>
#include <stdlib.h>
			  
int main(void)
{   

int i, j, m, n; 
scanf("%d", &n);//输入3 
 
//倒三角，少最下面一个（也可改为少正常三角的最上面一个） 
for(i=n;i>1;i--)
{
  for (j=i;j<n;j++)
{
    printf (" ");
  }     
  for (j =2*i; j > 1; j--){
    printf ("*");
  }     
  printf ("\n");
}

//正常三角
for(i=1;i<=n;i++)
{
  for(j=n;j>i;j--)
{
    printf (" ");
  }     
  for (j =1;j<2*i;j++){
    printf ("*");
  }     
  printf ("\n");
}
      return 0;
}

正菱形

  *
 ***
*****
 ***
  *

#include <stdio.h>
#include <stdlib.h>
			  
int main(void)
{   

int i, j, m, n; 
scanf("%d", &n);//输入3 

//正常三角
for(i=1;i<=n;i++)
{
  for(j=n;j>i;j--)
{
    printf (" ");
  }     
  for (j =1;j<2*i;j++){
    printf ("*");
  }     
  printf ("\n");
}

	 
//倒三角，少第一行（也可改为少正常三角的最下面一行） 
for(i=n-1;i>=1;i--)
{
  for (j=i;j<n;j++)
{
    printf (" ");
  }     
  for (j =2*i; j > 1; j--){
    printf ("*");
  }     
  printf ("\n");
}

      return 0;
}